TALCOSE SCHIST. 



521 



resembles trap rock. Thus the whole formation appears to be a sharp synclinal axis. 

 The same general varieties of rock occur in Luuenburg and Concord. 



Fia. 277. 



Section through Waterford. 



In this range of talcose schist in New Hampshire there are beds of limestone in the 

 towns of Haverhill, Lisbon, Lyme, Orford, Claremont and Cornish. But one bed as yet 

 has been found in Vermont in it, and that is upon the land of Col. White, in Lunenburgh. 



In Victory there is a band of chlorite schist in the mica schist, and in Guildhall there 

 is a band of talcose schist which we have regarded as the northern end of this range. North 

 of these localities the rock is mica schist ; and the talcose schist terminates in two prongs, 

 as it were, which are interstratified with the mica schist. Yet we have had doubts whether 

 the mica and talcose schists were not originally the same, but now are different through 

 metamorphism. 



The middle range of talcose schist commences in Middlefield, in Massachusetts. It 

 continues in a due northerly course until near the Vermont line, when it makes a large 

 curve to the east, hitherto not represented upon any map, entering the State at Halifax. 

 The formation is mostly composed of hornblende schist, plumbaginous schist, and talco- 

 micaceous schist for the first ten miles of its course, when talcose schist increases in 

 amount and finally predominates. North of Halifax there is a great amount of steatite 

 and serpentine, extending through the whole State in the form of beds, near which the 

 talcose schist is usually characteristic. In Marlboro, beds of gneiss and hornblende schist 

 are interstratified with the talcose schist. In Newfane, Dover, and Wardsboro, there are 

 many interesting varieties of rock and undulations in their position, which are described 

 upon Section III. In Jamaica, Townshend, and Windham, the formation is quite narrow 

 but well defined, with immense deposits of serpentine, steatite, and less abundant beds 

 of limestone. It is near the east line of Jamaica and the west line of Townshend that 

 this range extends, and also through the central parts of Windham. In the south part 

 of Andover, at Simonsville, at Andover Center, and all along the road from Windham to 

 Ludlow, talcose schist may be seen. 



We are beginning to find a considerable portion of limestone in this formation. There 



O O * 



are beds of it in Jamaica and in the south part of Windham. On Mr Hutchin's farm in 

 the west part of Andover there is a limekiln also in the north part of the town. East of 

 Simonsville also there is a considerable amount and in fact, according to a well-informed 

 citizen, there are small " bunches" of limestone upon almost every farm in Andover. 



In the south part of Ludlow there is limestone near A. Adams' house ; and also in the 

 west part of the town near the house of Levi. Lawrence. The latter is doubtless connect- 

 ed directly with the limestone in Plymouth, where it is of large extent. 



The talcose schist is well developed in Ludlow. At A. Adams' house in the south part 

 of the town there is the whetstone variety, which may be traced northerly several miles. 

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